#include <stdio.h>

/**
 * [main description]
 * 当 fahr = 0, 20, ·····,300时，分别对应celsius的值
 */
void main(){
    int fahr, celsius;
    int lower, upper, step;

    lower = 0;                  // 温度表下限
    upper = 300;             // 温度表上限
    step = 20;                 // 步长 

    fahr = lower;

    while(fahr <= upper){
        celsius = 5 * (fahr - 32) / 9;

        //printf("%d\t%d\n", fahr, celsius);
        printf("%3d %6d\n", fahr, celsius);

        fahr = fahr + step;
    }
}